17
Changing the CO measurement cell
Before installing the new CO measuring cell, carefully
remove the short-circuit spring from the contacts.
- Remove measurement cell from measurement chamber cover
and attach the new measuring cell.
Assembling testo 325
- Place the measurement chamber cover on the measurement
chamber. Tighten the fastening screws (3 off).
- Connect the mounting block with the electronics.
- Place the mounting block and electronics in the upper part of
the housing.
- Attach the mounting block and the electronics to the upper
part of the housing with the holder screws (2 off).
- Put upper part of housing in position and close in the opposite
direction to the arrow.
- Insert positioning plate and filter.
- Insert condensate trap. Ensure that it snaps into position.
- Put batteries/rechargeables into place and close battery
compartment cover.
- Remove the NO filter from the measurement chamber. When
installing the new filter ensure that the area with the bore holes
faces downward in the measurement chamber.
Maintenance
Changing CO measurement cells
When changing a CO measurement cell the NO filter should
also be replaced.
Short.circuit spring
CO measuring cell
